Preparation and properties of TiP/Mg-RE composites through laser melt injection

Authors：Gui, Zhenzhen^*; Lu, Yuanyuan; Chen, Hao; Cao, Liu; Kang, Zhixin; Wen, Guilin; Liu, Dejian^*

Source：MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2023, 287: 116095.

DOI：10.1016/j.mseb.2022.116095

• Laser melt injection
• Ti P
• Mg-RE composites
• Mechanical properties

Hardness and wear resistance of magnesium alloys should be improved without reducing mechanical properties to realize their widespread application. By adding metal particles into magnesium instead of ceramic particles can reducing the influence caused by large difference of thermophysical and mechanical properties between ceramics and Mg. The existing methods for Mg based composites are time-consuming, cause agglomeration, and not suitable for preparing complex surfaces. In this study, Ti particles were injected into Mg-RE alloy through laser melt injection. Results show that the prepared TiP/Mg-RE composites with large surface area have no obvious welding defects in microstructure. Ti particles have good metallurgical bonding with the Mg-RE matrix. Microhardness of the TiP/Mg-RE composites is 100% higher than that of the Mg-RE matrix, at a cost of reducing partial mechanical properties. Moreover, the composites showed a stable friction coefficient and running-in stage. The TiP/Mg-RE composites show excellent comprehensive properties in a summary.

• Institution
  广州大学; 华中科技大学